Yamashita Keigo wins 65th Honinbo

Post by **apetresc** » Tue Jun 29, 2010 1:00 am

White (Yamashita) took the 5th game of the Honinbo match a few minutes ago to win the title 4-1 against defender Hane Naoki. Here is the complete game:

[sgf-full](;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
GN[The 65th Honinbo Title Matches 5th game, Yamashita Tengen(W) vs Hane Honinbo(B)]PW[Yamashita Keigo]PB[Hane Naoki]WR[9p]BR[9p]DT[2010-06-29]PC[IGS-PandaNet]RE[W+7.50]
;B[pd]
;W[dp]
;B[pq]
;W[dc]
;B[cf]
;W[po]
;B[qo]
;W[pp]
;B[qp]
;W[oq]
;B[qn]
;W[di]
;B[cc]
;W[cd]
;B[dd]
;W[bc]
;B[cb]
;W[de]
;B[ed]
;W[ce]
;B[bb]
;W[pr]
;B[qq]
;W[np]
;B[iq]
;W[kq]
;B[fq]
;W[eq]
;B[fp]
;W[dn]
;B[nc]
;W[df]
;B[gd]
;W[fn]
;B[io]
;W[im]
;B[ko]
;W[jq]
;B[ir]
;W[jp]
;B[gn]
;W[jo]
;B[fm]
;W[en]
;B[gl]
;W[ip]
;B[hp]
;W[go];B[ho]
;W[hn]
;B[in]
;W[gm]
;B[jn]
;W[lp]
;B[jl]
;W[hl]
;B[cq]
;W[er]
;B[co]
;W[cn]
;B[hk]
;W[gk]
;B[hj]
;W[fl]
;B[kj]
;W[cp]
;B[jd]
;W[qg]
;B[qi]
;W[pi]
;B[qj]
;W[qd]
;B[qe]
;W[re]
;B[pe]
;W[rd]
;B[qc]
;W[rc]
;B[qb]
;W[qh]
;B[oh]
;W[og]
;B[ng]
;W[ph]
;B[nh]
;W[pj]
;B[qk]
;W[ll]
;B[jm]
;W[pl]
;B[pk]
;W[ok]
;B[ol]
;W[nj]
;B[om]
;W[lj]
;B[ki]
;W[gf]
;B[gj]
;W[fj]
;B[fi]
;W[ei]
;B[fh]
;W[eg]
;B[hf]
;W[gg]
;B[ee]
;W[ef]
;B[nk]
;W[oj]
;B[qf]
;W[ql]
;B[rl]
;W[ri]
;B[rj]
;W[si]
;B[rh]
;W[rg]
;B[rf]
;W[sf]
;B[rb]
;W[nl]
;B[nm]
;W[mk]
;B[mi]
;W[mm]
;B[ig]
;W[hg]
;B[he]
;W[ii]
;B[ij]
;W[hi]
;B[gi]
;W[ih]
;B[jg]
;W[il]
;B[kk]
;W[gr]
;B[fr]
;W[fs]
;B[qr]
;W[sj]
;B[rk]
;W[of]
;B[ne]
;W[bd]
;B[gq]
;W[db]
;B[eb]
;W[ab]
;B[ba]
;W[ik]
;B[jk]
;W[or]
;B[ls]
;W[lr]
;B[sc]
;W[se]
;B[ks]
;W[ms]
;B[is]
;W[nn]
;B[pm]
;W[ln]
;B[on]
;W[oo]
;B[mo]
;W[kn]
;B[no]
;W[mn]
;B[mr]
;W[ns]
;B[kr]
;W[lq]
;B[gs]
;W[hs]
;B[hr]
;W[li]
;B[lh]
;W[nf]
;B[mf]
;W[oe]
;B[od]
;W[pg]
;B[gs]
;W[es]
;B[ep]
;W[dq]
;B[sk]
;W[sh]
;B[eh]
;W[dh]
;B[eo]
;W[do]
;B[qs]
;W[fe]
;B[fd]
;W[jh]
;B[kh]
;W[jr]
;B[js]
;W[km]
;B[os]
;W[nr]
;B[ps]
;W[fo])[/sgf-full]

Post by **apetresc** » Tue Jun 29, 2010 1:04 am

Here are two particularly interesting moments in the endgame (which surprised at least the sizeable IGS audience).

Click Here To Show Diagram Code: [go]$$Wc Reduction tesuji? What happens after H12? $$ +-------------------------------------+ $$ |. . . . . . . . . . . . . . . . . . .| $$ |. X X . . . . . . . . . . . . . X X .| $$ |. O X O . . . . . . . . . X . . X O .| $$ |. . O X X . X . . X . . . . . X O O .| $$ |. . O O X . . X . . . . . . . X X O .| $$ |. . X O O . O X . . . . . . . . X X O| $$ |. . . . O . O O X . . . . X O . O O .| $$ |. . . . . X . . . . . . . X X O O X .| $$ |. . . O O X . . @ . X . X . . O X O O| $$ |. . . , . O X X . , X O . O O O X X .| $$ |. . . . . . O X . . . . O . O X X . .| $$ |. . . . . O . O . X . O . O X O O X .| $$ |. . . . . X O . O X . . O X X . . . .| $$ |. . O O O O . O X X . . . . . . X . .| $$ |. . X . . . O X X O X . . . . O X . .| $$ |. . O O . X . X O O . O . O . O X . .| $$ |. . X . O X . . X O O . . . O X X . .| $$ |. . . . O . . . X . . . . . . O . . .| $$ |. . . . . . . . . . . . . . . . . . .| $$ +-------------------------------------+[/go]

Click Here To Show Diagram Code: [go]$$Wc Mistake? What is black trying to accomplish here? $$ +-------------------------------------+ $$ |. X . . . . . . . . . . . . . . . . .| $$ |O X X O X . . . . . . . . . . . X X .| $$ |. O X O . . . . . . . . . X . . X O X| $$ |. O O X X . X . . X . . . . . X O O .| $$ |. . O O X . . X . . . . . X . X X O O| $$ |. . X O O . O X . . . . . . O . X X O| $$ |. . . . O . O O X X . . . X O . O O .| $$ |. . . . . X . . O . . . . X X O O X .| $$ |. . . O O X X O O . X . X . . O X O O| $$ |. . . , . O X X X , X O . O O O X X O| $$ |. . . . . . O X O X X . O . O X X X .| $$ |. . . . . O . O O X . O . O X O O X .| $$ |. . . . . X O . O X . . O X X X . . .| $$ |. . O O O O . O X X . O . O X . X . .| $$ |. . X . . . O X X O X . # . O O X . .| $$ |. . O O . X . X O O . O . O . O X . .| $$ |. . X . O X X . X O O . . . O X X . .| $$ |. . . . O X O . X . . O . . O O X . .| $$ |. . . . . O . . X . X X O . . . . . .| $$ +-------------------------------------+[/go]

Jonas · Post by **Jonas** » Tue Jun 29, 2010 3:11 am

Click Here To Show Diagram Code: [go]$$Bc Reduction tesuji? What happens after H12? $$ +-------------------------------------+ $$ |. . . . . . . . . . . . . . . . . . .| $$ |. X X . . . . . . . . . . . . . X X .| $$ |. O X O . . . . . . . . . X . . X O .| $$ |. . O X X . X . . X . . . . . X O O .| $$ |. . O O X . . X . . . . . . . X X O .| $$ |. . X O O . O X . . . . . . . . X X O| $$ |. . . . O . O O X . . . . X O . O O .| $$ |. . . . . X . 1 0 . . b . X X O O X .| $$ |. . . O O X . a @ 9 X . X . . O X O O| $$ |. . . , . O X X 3 8 X O . O O O X X .| $$ |. . . . . . O X 2 4 5 . O . O X X . .| $$ |. . . . . O . O 6 X 7 O . O X O O X .| $$ |. . . . . X O . O X . . O X X . . . .| $$ |. . O O O O . O X X . . . . . . X . .| $$ |. . X . . . O X X O X . . . . O X . .| $$ |. . O O . X . X O O . O . O . O X . .| $$ |. . X . O X . . X O O . . . O X X . .| $$ |. . . . O . . . X . . . . . . O . . .| $$ |. . . . . . . . . . . . . . . . . . .| $$ +-------------------------------------+[/go]

Wow, the white move is simply amazing, I believe Black cant play H12 because of the shown variation above, if Black ladders white at 'a' White can play 'b' as a ladderbreaker and connect out.

Click Here To Show Diagram Code: [go]$$Wc Mistake? What is black trying to accomplish here? $$ +-------------------------------------+ $$ |. X . . . . . . . . . . . . . . . . .| $$ |O X X O X . . . . . . . . . . . X X .| $$ |. O X O . . . . . . . . . X . . X O X| $$ |. O O X X . X . . X . . . . . X O O .| $$ |. . O O X . . X . . . . . X . X X O O| $$ |. . X O O . O X . . . . . . O . X X O| $$ |. . . . O . O O X X . . . X O . O O .| $$ |. . . . . X . . O . . . . X X O O X .| $$ |. . . O O X X O O . X . X . . O X O O| $$ |. . . , . O X X X , X O . O O O X X O| $$ |. . . . . . O X O X X . O . O X X X .| $$ |. . . . . O . O O X . O . O X O O X .| $$ |. . . . . X O . O X . . O X X X . . .| $$ |. . O O O O . O X X 4 O . O X a X . .| $$ |. . X . . . O X X O X 1 # 2 O O X . .| $$ |. . O O . X . X O O . O 3 O . O X . .| $$ |. . X . O X X . X O O . . . O X X . .| $$ |. . . . O X O . X . . O . . O O X . .| $$ |. . . . . O . . X . X X O . . . . . .| $$ +-------------------------------------+[/go]

Hmmm now White cant atari at 'a', otherwise I dont see a reason to play the marked stone...

Magicwand · Post by **Magicwand** » Tue Jun 29, 2010 5:48 am

Jonas: close..but i think your sequence is wrong..because black can atari from behind ang giveup two stone.
below is correct sequence i think...

Click Here To Show Diagram Code: [go]$$Bc Reduction tesuji? What happens after H12? $$ +-------------------------------------+ $$ |. . . . . . . . . . . . . . . . . . .| $$ |. X X . . . . . . . . . . . . . X X .| $$ |. O X O . . . . . . . . . X . . X O .| $$ |. . O X X . X . . X . . . . . X O O .| $$ |. . O O X . . X . . . . . . . X X O .| $$ |. . X O O . O X 7 . . . . . . . X X O| $$ |. . . . O . O O X 6 . . . X O . O O .| $$ |. . . . . X 5 1 4 . . . . X X O O X .| $$ |. . . O O X 3 2 @ . X . X . . O X O O| $$ |. . . , . O X X 9 . X O . O O O X X .| $$ |. . . . . . O X 8 0 . . O . O X X . .| $$ |. . . . . O . O . X . O . O X O O X .| $$ |. . . . . X O . O X . . O X X . . . .| $$ |. . O O O O . O X X . . . . . . X . .| $$ |. . X . . . O X X O X . . . . O X . .| $$ |. . O O . X . X O O . O . O . O X . .| $$ |. . X . O X . . X O O . . . O X X . .| $$ |. . . . O . . . X . . . . . . O . . .| $$ |. . . . . . . . . . . . . . . . . . .| $$ +-------------------------------------+[/go]

of if he plays 2 differently ...see below.

Click Here To Show Diagram Code: [go]$$Bc Reduction tesuji? What happens after H12? $$ +-------------------------------------+ $$ |. . . . . . . . . . . . . . . . . . .| $$ |. X X . . . . . . . . . . . . . X X .| $$ |. O X O . . . . . . . . . X . . X O .| $$ |. . O X X . X . . X . . . . . X O O .| $$ |. . O O X . . X . . . . . . . X X O .| $$ |. . X O O . O X . . . . . . . . X X O| $$ |. . . . O . O O X . . . . X O . O O .| $$ |. . . . . X 3 1 . . . . . X X O O X .| $$ |. . . O O X . 2 @ . X . X . . O X O O| $$ |. . . , . O X X 5 0 X O . O O O X X .| $$ |. . . . . . O X 4 6 7 . O . O X X . .| $$ |. . . . . O . O 8 X 9 O . O X O O X .| $$ |. . . . . X O . O X . . O X X . . . .| $$ |. . O O O O . O X X . . . . . . X . .| $$ |. . X . . . O X X O X . . . . O X . .| $$ |. . O O . X . X O O . O . O . O X . .| $$ |. . X . O X . . X O O . . . O X X . .| $$ |. . . . O . . . X . . . . . . O . . .| $$ |. . . . . . . . . . . . . . . . . . .| $$ +-------------------------------------+[/go]

for second diag. i can see that he stopped white's sente move on two places...but he also lost points so i dont understand how that can be tesuji. beyond the scope of my brain.

Jonas · Post by **Jonas** » Tue Jun 29, 2010 5:57 am

Oh, I missed the atari with White 10 in your last diagram and thought this couldnt be the solution ;-)

Life In 19x19

Yamashita Keigo wins 65th Honinbo

Yamashita Keigo wins 65th Honinbo

Re: Yamashita Keigo wins 65th Honinbo

Re: Yamashita Keigo wins 65th Honinbo

Re: Yamashita Keigo wins 65th Honinbo

Re: Yamashita Keigo wins 65th Honinbo